One of my favorites is an avocado (yes it's heavy,but it gets eaten quickly),a couple or three salsa packets, and a couple of rice cakes. Cut the avocado in half, remove pit and in each half mash the flesh, add salsa and scoop onto a rice cake, serves 2. Pack out skin and seed. I like this on a weekend overnighter when weight isn't really an issue.

Breakfast: favorite granola, powdered rice milk, and freeze dried fruit, just add cold water.